Product details

Regulated outputs (#) 5 Vin (Min) (V) 3.0 Vin (Max) (V) 4.0 Iout (Max) (A) 3 TI functional safety category Functional Safety-Compliant Rating Automotive Step-down DC/DC controller 0 Step-down DC/DC converter 3 Step-up DC/DC controller 0 Step-up DC/DC converter 1 LDO 1 Iq (Typ) (mA) 0.02 Features Output Short-Circuit and Overload Protection, Over Voltage Protection, UVLO, Overtemperature Warning and Protection, SPI Operating temperature range (C) -40 to 125 Processor name mmWave AWR, mmWave IWR Processor supplier TI Shutdown current (ISD) (Typ) (uA) 20 Configurability Factory programmable, Software configurable
Regulated outputs (#) 5 Vin (Min) (V) 3.0 Vin (Max) (V) 4.0 Iout (Max) (A) 3 TI functional safety category Functional Safety-Compliant Rating Automotive Step-down DC/DC controller 0 Step-down DC/DC converter 3 Step-up DC/DC controller 0 Step-up DC/DC converter 1 LDO 1 Iq (Typ) (mA) 0.02 Features Output Short-Circuit and Overload Protection, Over Voltage Protection, UVLO, Overtemperature Warning and Protection, SPI Operating temperature range (C) -40 to 125 Processor name mmWave AWR, mmWave IWR Processor supplier TI Shutdown current (ISD) (Typ) (uA) 20 Configurability Factory programmable, Software configurable
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
  • Functional Safety -Compliant device
    • Developed for functional safety applications
    • Documentation available to aid ISO 26262 functional safety system design up to ASIL-C/SIL-2
    • Input supply overvoltage and undervoltage monitoring
    • Regulator output overvoltage and undervoltage monitoring
    • Overvoltage and undervoltage monitoring for one external rail
    • Q&A Watchdog
    • Level or PWM error signal monitor (ESM)
    • BIST and CRC
  • Input voltage: 3.3 V nominal (3 V to 4 V range)
  • 3 high-efficiency step-down DC/DC converters:
    • Output voltage: 0.9 V to 1.9 V
    • Maximum output current: 3 A/ 3 A/ 3 A
    • Switching frequency: 4.4 MHz, 8.8 MHz, and 17.6 MHz
  • 5 V boost converter
    • Maximum output current: 350 mA
  • 150 mA LDO
    • Output voltage 1.8 V or 3.3 V
  • Output short-circuit and overload protection
  • Input overvoltage protection (OVP) and undervoltage lockout (UVLO)
  • Overtemperature warning and protection
  • Serial peripheral interface (SPI)
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
  • Functional Safety -Compliant device
    • Developed for functional safety applications
    • Documentation available to aid ISO 26262 functional safety system design up to ASIL-C/SIL-2
    • Input supply overvoltage and undervoltage monitoring
    • Regulator output overvoltage and undervoltage monitoring
    • Overvoltage and undervoltage monitoring for one external rail
    • Q&A Watchdog
    • Level or PWM error signal monitor (ESM)
    • BIST and CRC
  • Input voltage: 3.3 V nominal (3 V to 4 V range)
  • 3 high-efficiency step-down DC/DC converters:
    • Output voltage: 0.9 V to 1.9 V
    • Maximum output current: 3 A/ 3 A/ 3 A
    • Switching frequency: 4.4 MHz, 8.8 MHz, and 17.6 MHz
  • 5 V boost converter
    • Maximum output current: 350 mA
  • 150 mA LDO
    • Output voltage 1.8 V or 3.3 V
  • Output short-circuit and overload protection
  • Input overvoltage protection (OVP) and undervoltage lockout (UVLO)
  • Overtemperature warning and protection
  • Serial peripheral interface (SPI)

The LP8774x-Q1 device is designed to meet the power management requirements of the AWR and IWR MMICs in various automotive and industrial radar applications. The device has three step-down DC/DC converters, a 5 V boost converter and a 1.8 V/3.3 V LDO. The LDO is powered from the boost and intended for xWR IO supply. The device is controlled by an SPI serial interface and by enable signals.

The step-down DC/DC converters support programmable switching frequency of 4.4 MHz, 8.8 MHz, or 17.6 MHz. High switching frequency and low noise across wide frequency range enable LDO-free power solution with minimal or no passive filtering. This improves thermals and transient settling for the MMIC RF rails. The switching clock is forced to PWM mode for optimal RF performance and can also be synchronized to an external clock. The LP8774x-Q1 device supports remote voltage sensing to compensate IR drop between the regulator output and the point-of-load (POL) which improves the accuracy of the output voltage.

The LP8774x-Q1 device supports programmable start-up and shutdown delays and sequences which are synchronized to the ENABLE signal. The sequences can also include GPO signals to control external regulators, load switches, and processor reset. The default settings for the device are programmed into nonvolatile memory (NVM). The device controls the output slew rate to minimize output voltage overshoot and in-rush current during device start-up.

The LP8774x-Q1 device is designed to meet the power management requirements of the AWR and IWR MMICs in various automotive and industrial radar applications. The device has three step-down DC/DC converters, a 5 V boost converter and a 1.8 V/3.3 V LDO. The LDO is powered from the boost and intended for xWR IO supply. The device is controlled by an SPI serial interface and by enable signals.

The step-down DC/DC converters support programmable switching frequency of 4.4 MHz, 8.8 MHz, or 17.6 MHz. High switching frequency and low noise across wide frequency range enable LDO-free power solution with minimal or no passive filtering. This improves thermals and transient settling for the MMIC RF rails. The switching clock is forced to PWM mode for optimal RF performance and can also be synchronized to an external clock. The LP8774x-Q1 device supports remote voltage sensing to compensate IR drop between the regulator output and the point-of-load (POL) which improves the accuracy of the output voltage.

The LP8774x-Q1 device supports programmable start-up and shutdown delays and sequences which are synchronized to the ENABLE signal. The sequences can also include GPO signals to control external regulators, load switches, and processor reset. The default settings for the device are programmed into nonvolatile memory (NVM). The device controls the output slew rate to minimize output voltage overshoot and in-rush current during device start-up.

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Technical documentation

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Type Title Date
* Data sheet LP8774x-Q1 Three Buck Converters and 5-V Boost for AWR and IWR Radar Sensors datasheet 10 Aug 2021
Technical article 3 quiescent-current (Iq) specifications you need to understand 12 Nov 2021
Certificate LP877451Q1EVM EU RoHS Declaration of Conformity (DoC) 27 Sep 2021

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LP877451Q1EVM — LP8774x-Q1 ADAS PMIC low-noise configuration 3-buck and 5-V boost evaluation module

The LP8774x-Q1 device is designed to meet the power management requirements of the AWR and IWR MMICs in various automotive and industrial radar applications. The device has three step-down DC/DC converters, a 5 V boost converter and a 1.8 V/3.3 V LDO. The LDO is powered from the boost and (...)

Simulation model

LP87745-Q1 Transient and AC SIMPLIS Model

SNVMC81.ZIP (57 KB) - SIMPLIS Model
Calculation tool

PEET-GUI — PMIC Efficiency Estimator Tool (PEET)

The PMIC Efficiency Estimator Tool (PEET GUI) is a graphical user interface used to easily evaluate PMIC DC/DC regulator efficiency relative to your design conditions. The PEET GUI can be used to configure each DC/DC regulator separately and provides real-time efficiency and power dissipation data (...)
Reference designs

TIDEP-01027 — High-end corner radar reference design

The TIDA-01027 reference design provides a foundation for corner radar applications to meet NCAP R79 safety requirements using the AWR2944 evaluation module (EVM). The design allows users to estimate and track the position (in the azimuthal plane) and velocity of objects in device field of view (...)
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